Milk-strainer



NAPP.

MILK STRAINER.

N0. 383 307. PatenteMy 22, 1888.

INVENTOR:

WITNESSES;

BY M 7 V I T A. TO EN UNITED STATES PATENT OFFICE.

GEORGE W. KNAPP, OF BALTIMORE, MARYLAND.

MILK-=STRAINER.

SPECIFICATION forming part of Letters Patent No. 383,307, dated May 22, 1888.

Application filed October 22, 1887. Serial No. 253,054. (No model.)

To all whom it may concern:

Be it known that I, GEORGE W. KNAPP, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvcmentsin Milk- Strainers, of which the followingis a specification.

My invention relates to strainers; and it consists in 'an improvement in attaching wiregauze or woven wire to the sheet metal of which the vessel part of the strainer is composed.

The invention is illustrated in the accompanying drawings, in whi Figure 1 is a side view of an ordinary milkstrainer. Fig. 2 is a sectional view of the bottom parts of the strainer, showing their shape and relative position previous to being attached together. Figs. 3 and 4 are views of the wire-gauze shaped preparatory to attach ment. Figs. 5 and 6 are views of the confining-1ing. Fig. 7 is a sectional view of the bottom of the strainer. Fig. 8 is an inverted plan view or lower side view of the strainerbottom. Fig. 9 is a sectional view, on a larger scale, of the joint where the wire-gauze is at taehed to sheet metal.

The vessel part A of the strainer is made of sheet metal, and may have any desired shape. It has a bottom, I), and a base foot, 0, which supports it. The sheetanetal bottom I) is cut out at the center and forms a round hole or opening, (I, which is closed by the wiregauze e.

Ileretofore strainers made just as above stated have had the brass wire-gauze attached to and secured over the pe-ring :3 in the center of the sheet-metal bottom I) by solder. The solder is objectionable, chiefly because in applying it an acid flux is necessarily used with brass wiiegauze. The acid flux often spreads or spatters, and thereby discolors and corrodes the brass wire-gauze.

My invention enables wire-gauze of any kind to be attached to the strainer-bottoms made as above described without the use of solder, and thereby obviates the objections named, and also makes a better and cheaper article.

In carrying out my invention a flange,f, is formed around the center hole or opening, d, in the bottom, (see Fig. 2,) the wire-gauze e is cut to a circular shape to fit the center opening, d, and has around its rim a flange,

e, which takes position about the flangefon the bottom. To attach the parts, a joint is formed by interlocking the flange f on the bottom with the flange e on the wireganze. A confining-ring, g, is closed around the said jointf e, as shown in Figs. 7, S, and 9. The addition thereto of the cont] ning-ring f] adds to the strength and security of the parts. In preparing this ring a flange, 1/, is formed around its outer edge, (see Figs. 2 and 5,) and the ring is placed against the wire-gauze, as shown in Fig. 2. In forming the interlocking joint with the confining-ring suitable wellknown toolsare employed, and the wire-gauze flange e'aud the ring-flange gare both turned inward, ort'oward the center opening, d, while the flange f on the sheet-metal bottom is turned outward,or away from the central opening. (See Fig. 9.) The wire-gauzeis dished or pressed upward, in order that upon the upper surface it will be flush with the upper surface of the sheet-metal bottom 0, and the inner edge, 9 of the confining-ring is also pressed upward, and thereby the said ring is closed tightly around thejoint.

In the drawings the outward-turned flange f on the sheetmetal bottom Z) is shown on the lower side of the said bottom. In other words, said flangefis here formed by turning the metal downward. It is not essential, however, that said flangef should have this position, for it may be on the upper side of the bottomthat is, in its formation the metal may be turned upward.

Having described my invention, I claim- A milk-strainer consisting of the vessel A, with bottom b, having opening (I, and flange surrounding said opening, the wire-eloth 0, having flange c, the fastening-ring 5 with flange g, the said flange 9 being inwardly bent so as to have its end interlocked between the bottom b and flangef, and the flange a being held between said interlockedportions of said flanges g andf, and the inner edge, of the ringg, with the wire gauze, being pressed up Ward, whereby said gauze is flush with said bottom ofthe strainer, substantially as shown and described.

In testimony whereof I affix my signature in the presence of two witnesses.

GEORGE W. KNAPP. Witnesses:

JOHN E. MoRRIs, JNO. T. MADDQX. 

